Abstract
The results of phenological observations in ageomorphologically differentiated area are shown.Phenological surveys were conducted on flowering andpollen emission of some common and widely diffusedGraminaceae species, using a 7-step key. By means ofmultiple regression analysis altitude,latitude, slope and exposure were identified as significantenvironmental factors in giving rise to thepollination: in particular with respect to altitude thephenological pattern showed a negative gradient below100 m of altitude and a positive one above.
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